Problem: You are given three numbers. Is there a way to replace variables A, B and C with these numbers so the equality A + B = C is correct?

Input:

There are three numbers X1, X2 and X3 (1 ≤ Xi ≤ 10^100), each on a separate line of input.

Output:

Output either "YES", if there is a way to substitute variables A, B and C with given numbers so the equality is correct, or "NO" otherwise.

Sample Input:

1

2

3

Output:

YES

Sample Input:

1

2

4

Output

YES

Sample Input:

1

3

5

Output

NO

SAMPLE INPUT
1
2
3

SAMPLE OUTPUT
YES

Solution (in PYTHON):

Solution:
a=int(raw_input())
b=int(raw_input())
c=int(raw_input())
if((a==b+c) or (b==a+c) or(c==a+b)):
		print "YES"
elif((a==2*b)or (a==2*c)or(b==2*a)or(b==2*c)or(c==2*a)or(c==2*b)):
		print "YES"
else :
		print "NO"